Table 1: Study population.
Group		Number	Mean age ± SD in years
Women with bad obstetric history	Pregnant	292	28.35 ± 7.25
	Non pregnant	255	28.24 ± 6.81
	Total	547		Women with normal pregnancy	Pregnant	140	27.40 ± 6.24
Non pregnant	151	28.06 ± 10.51	Total		291
Grand total		838	28.42 ± 7.72
P value	ANOVA NS